#!/usr/bin/env ruby
# frozen_string_literal: true

$LOAD_PATH << '.'
$LOAD_PATH << File.join(__dir__, '../lib')
$LOAD_PATH << File.join(__dir__, '../ext')

require 'optparse'
require 'perf'
require 'oj'

@verbose = false
@indent = 0
@iter = 20_000
@with_bignum = false
@with_nums = true
@size = 0
@symbolize = false
@cache_keys = true

opts = OptionParser.new
opts.on('-v', 'verbose')                                    { @verbose = true }
opts.on('-c', '--count [Int]', Integer, 'iterations')       { |i| @iter = i }
opts.on('-i', '--indent [Int]', Integer, 'indentation')     { |i| @indent = i }
opts.on('-s', '--size [Int]', Integer, 'size (~Kbytes)')    { |i| @size = i }
opts.on('-b', 'with bignum')                                { @with_bignum = true }
opts.on('-n', 'without numbers')                            { @with_nums = false }
opts.on('-z', '--symbolize', 'symbolize keys')              { @symbolize = true }
opts.on('-k', '--no-cache', 'turn off key caching')         { @cache_keys = false }
opts.on('-h', '--help', 'Show this display')                { puts opts; Process.exit!(0) }
opts.parse(ARGV)

if @with_nums
  @obj = {
    'a' => 'Alpha', # string
    'b' => true,    # boolean
    'c' => 12_345,   # number
    'd' => [ true, [false, [-123_456_789, nil], 3.9676, ['Something else.', false], nil]], # mix it up array
    'e' => { 'zero' => nil, 'one' => 1, 'two' => 2, 'three' => [3], 'four' => [0, 1, 2, 3, 4] }, # hash
    'f' => nil,     # nil
    'h' => { 'a' => { 'b' => { 'c' => { 'd' => {'e' => { 'f' => { 'g' => nil }}}}}}}, # deep hash, not that deep
    'i' => [[[[[[[nil]]]]]]]  # deep array, again, not that deep
  }
  @obj['g'] = 12_345_678_901_234_567_890_123_456_789 if @with_bignum
else
  @obj = {
    'a' => 'Alpha',
    'b' => true,
    'c' => '12345',
    'd' => [ true, [false, ['12345', nil], '3.967', ['something', false], nil]],
    'e' => { 'zero' => '0', 'one' => '1', 'two' => '2' },
    'f' => nil,
    'h' => { 'a' => { 'b' => { 'c' => { 'd' => {'e' => { 'f' => { 'g' => nil }}}}}}}, # deep hash, not that deep
    'i' => [[[[[[[nil]]]]]]]  # deep array, again, not that deep
  }
end

Oj.default_options = { :indent => @indent, :mode => :strict, cache_keys: @cache_keys, cache_str: 5 }

if 0 < @size
  ob = @obj
  @obj = []
  (4 * @size).times do
    @obj << ob
  end
end

@json = Oj.dump(@obj)
@failed = {} # key is same as String used in tests later

def capture_error(tag, orig, load_key, dump_key, &blk)
  obj = blk.call(orig)
  raise "#{tag} #{dump_key} and #{load_key} did not return the same object as the original." unless orig == obj
rescue Exception => e
  @failed[tag] = "#{e.class}: #{e.message}"
end

# Verify that all packages dump and load correctly and return the same Object as the original.
capture_error('Oj:strict', @obj, 'load', 'dump') { |o|
  Oj.strict_load(Oj.dump(o))
}
capture_error('Yajl', @obj, 'encode', 'parse') { |o|
  require 'yajl'
  Yajl::Parser.parse(Yajl::Encoder.encode(o))
}
capture_error('JSON::Ext', @obj, 'generate', 'parse') { |o|
  require 'json'
  require 'json/ext'
  JSON.generator = JSON::Ext::Generator
  JSON.parser = JSON::Ext::Parser
  JSON.parse(JSON.generate(o))
}

Oj.default_options = { symbol_keys: @symbolize }

if @verbose
  puts "json:\n#{@json}\n"
  puts "Oj loaded object:\n#{Oj.strict_load(@json)}\n"
  puts "Yajl loaded object:\n#{Yajl::Parser.parse(@json)}\n"
  puts "JSON loaded object:\n#{JSON::Ext::Parser.new(@json).parse}\n"
end

puts '-' * 80
puts 'Strict Parse Performance'
perf = Perf.new()
unless @failed.key?('JSON::Ext')
  if @symbolize
    perf.add('JSON::Ext', 'parse') { JSON.parse(@json, symbolize_names: true) }
  else
    perf.add('JSON::Ext', 'parse') { JSON.parse(@json) }
  end
  perf.before('JSON::Ext') { JSON.parser = JSON::Ext::Parser }
end
unless @failed.key?('Oj:strict')
  perf.add('Oj:strict', 'strict_load') { Oj.strict_load(@json) }
  perf.add('Oj:wab', 'wab_load') { Oj.wab_load(@json) }
end
perf.add('Yajl', 'parse') { Yajl::Parser.parse(@json) } unless @failed.key?('Yajl')
perf.run(@iter)

puts '-' * 80
puts 'Strict Dump Performance'
perf = Perf.new()
unless @failed.key?('JSON::Ext')
  perf.add('JSON::Ext', 'dump') { JSON.generate(@obj) }
  perf.before('JSON::Ext') { JSON.generator = JSON::Ext::Generator }
end
unless @failed.key?('Oj:strict')
  perf.add('Oj:strict', 'dump') { Oj.dump(@obj) }
end
perf.add('Yajl', 'encode') { Yajl::Encoder.encode(@obj) } unless @failed.key?('Yajl')
perf.run(@iter)

puts
puts '-' * 80
puts

unless @failed.empty?
  puts 'The following packages were not included for the reason listed'
  @failed.each { |tag, msg| puts "***** #{tag}: #{msg}" }
end
